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中文摘要：
设计合成了一个萘酰亚胺类SCN-离子探针NNN，其合成方法简单，条件温和。能够在水溶液中专一识别SCN-离子，检测浓度最小可以达到20μmol／L，随着SCN一离子的加入，化合物NNN吸收光谱蓝移了60nm，从黄色变为无色，这种明显的颜色变化，有利于可视观察。通过双波长比例变化，可以实现SCN-离子20μmol／L～0．8mmol／L范围内的定量检测。SCN-离子能够猝灭化合物NNN的荧光，荧光强度前后变化明显，荧光量子产率由原来的0．33减弱到0．02。通过荧光光谱和吸收光谱两种手段实现对SCN-的检测，选择性好，灵敏度较高。
英文摘要：
In this article, a new thiocyanate sensor NNN based on naphthalimide was conveniently synthesized using a simple method, and all the reactions were taken at room temperature. The determination process can be taken out in water and has no interference by any other anions. NNN has large Stocks shift about 100 - 140 nm in different solvent, and high quantum yield about 0.6 in polar solvent. With the addition of SCN-, the absorption peak of NNN at 417 nm decreases, at the same time a new absorption peak appears at 347 nm, when the concentration of SCN- is up to 1 mmol/L, the peak at 417 nm is disappeared. The absorption wavelength has a blue-shift of 60 nm, the colour of the solution changes from yellow to colorless. This obvious difference in colour is easy to observe by naked eyes. The ratio of two peak values on absorption spectra is linearly related to the concentration of the SCN- in a large range （20 μmoL/L -0.8 mmol/L）, this result makes the quantitative analysis of SCN- realizable. The fluorescence of NNN is quenched by the SCN- , the fluorescence quantum yield decreases from 0. 33 to 0. 02, there is no other anions to interference the detection.
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